12220999999 has 4 divisors (see below), whose sum is σ = 13161076936. Its totient is φ = 11280923064.

The previous prime is 12220999991. The next prime is 12221000003. The reversal of 12220999999 is 99999902221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99999902221 = 2473 ⋅40436677.

It is a cyclic number.

It is not a de Polignac number, because 12220999999 - 2³ = 12220999991 is a prime.

It is a Duffinian number.

12220999999 is a modest number, since divided by 999999 gives 12220 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220999991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 470038449 + ... + 470038474.

It is an arithmetic number, because the mean of its divisors is an integer number (3290269234).

Almost surely, 2^12220999999 is an apocalyptic number.

12220999999 is a deficient number, since it is larger than the sum of its proper divisors (940076937).

12220999999 is an equidigital number, since it uses as much as digits as its factorization.

12220999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940076936.

The product of its (nonzero) digits is 4251528, while the sum is 61.

The spelling of 12220999999 in words is "twelve billion, two hundred twenty million, nine hundred ninety-nine thousand, nine hundred ninety-nine".